Fluidized txaj muab tub lim, tseem hu ua MBBR muab tub lim, yog ib hom tshiab ntawm bioactive cab kuj. Nws txais cov qauv kev tshawb fawb, raws li kev xav tau ntawm cov dej sib txawv, sib xyaw ntau hom microelements hauv cov ntaub ntawv polymer uas tsim nyog rau kev loj hlob sai ntawm cov kab mob mus rau qhov txuas. Cov qauv ntawm hollow muab tub lim yog tag nrho ntawm peb txheej ntawm hollow lub voj voog sab hauv thiab sab nraud, txhua lub voj voog muaj ib lub cev sab hauv thiab 36 prongs sab nraud, nrog cov qauv tshwj xeeb, thiab cov muab tub lim raug tshem tawm hauv dej thaum lub sijhawm ua haujlwm. Cov kab mob anaerobic loj hlob hauv qhov muab tub lim los tsim denitrification; Cov kab mob aerobic loj hlob sab nraud kom tshem tawm cov organic teeb meem, thiab muaj cov txheej txheem nitrification thiab denitrification hauv tag nrho cov txheej txheem kho. Nrog rau qhov zoo ntawm thaj chaw loj tshwj xeeb, hydrophilic thiab affinity zoo tshaj plaws, siab ua haujlwm lom neeg, ceev dai zaj duab xis, kev kho mob zoo, kev pab lub neej ntev, thiab lwm yam, yog qhov kev xaiv zoo tshaj plaws rau tshem tawm ammonia nitrogen, decarbonization thiab phosphorus tshem tawm, dej phwj tuaj, dej rov siv dua, dej phwj deodorization COD, BOD los tsa tus qauv.